75Pcs/lot Plastic motor gear,rack, pulley, belt,Worm gear,Single-and double-gear

9 kind of Spindle gear?11 kind of Crown gear?
12 kind of Single gear?
19 kind of Double gear?
7 kind of Belt pulley
?2 kind of Worm gear?
5 kind of Belt
?2 PCS Connect rack
?6 PCS Axle sleeve
?1 PC Tee Axle Sleeve?
1 PC Bevel gear